Detachable screw-driven constant pressure gastric tube food injector

Abstract

The utility model relates to medical instrument field especially detachable screw rod drive type constant pressure stomach tube food injection device, including injection cylinder and connecting pipe, the bottom end of injection cylinder is connected with base with screw thread, the bottom end of base is firmly equipped with electric push rod, the output of electric push rod is firmly equipped with piston plate, the end of piston plate is equipped with piston block, the top of injection cylinder is connected with end cover with screw thread, the top of end cover is firmly equipped with fixed connecting seat, compared with traditional constant pressure stomach tube food injection device, through the cooperation of limiting pipe, antiskid groove and connecting pipe, the antiskid property of connecting pipe end and limiting pipe connection is improved, the stability of spring tablet whole movement is improved through the cooperation of fixed connecting seat and movable connecting seat, spring tablet all presents arc symmetry distribution on the inner side wall of second slot, spring tablet is pressed on the side wall of connecting pipe respectively, thereby improves the stability that connecting pipe sleeve sets up on the outer surface of limiting pipe, thereby avoids the loosening and falling of connecting pipe, improves the stability of food injection.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to a detachable screw-driven constant pressure gastric tube feeding device. Background Technology

[0002] A gastric feeding tube is a medical device used to provide nutritional support to patients who cannot eat orally.

[0003] Existing nasogastric tube feeding devices generally consist of a syringe, a connecting tube, and a piston. The syringe typically comes in different capacities and is used to draw and deliver food or medication. The connecting tube connects the syringe and the feeding tube and is usually made of soft silicone or plastic, possessing a degree of elasticity and flexibility to facilitate operation and reduce patient irritation. Pressure is generated by the piston movement of the syringe, which slowly injects the drawn-out liquid, such as food, water, or medication, through the connecting tube and nasogastric connector into the patient's stomach, thereby achieving the purpose of artificial feeding and medication administration.

[0004] In the use of existing gastric tube feeding devices, the connecting tube is usually sleeved on the end of the syringe. When the piston moves and generates pressure, the connecting tube may loosen and fall off the end of the syringe, causing the feeding process to be interrupted, increasing patient pain and nursing difficulty, and affecting the stability of feeding. Utility Model Content

[0005] To overcome the problem that existing gastric tube feeding devices typically have a connecting tube fitted onto the end of the syringe, which may loosen and detach from the syringe end when the piston moves and generates pressure, causing interruptions in the feeding process, increasing patient suffering and nursing difficulty, and affecting the stability of the feeding process.

[0006] The technical solution of this utility model is as follows: a detachable screw-driven constant pressure gastric tube feeding device, including an injection cylinder and a connecting tube. The bottom end of the injection cylinder is threadedly connected to a base, the bottom end of the base is fixedly provided with an electric push rod, the output end of the electric push rod is fixedly provided with a piston plate, the end of the piston plate is fitted with a piston block, the top end of the injection cylinder is threadedly connected to an end cap, the top end of the end cap is fixedly provided with a fixed connecting seat, the top end of the fixed connecting seat is fixedly provided with a limiting tube, the connecting tube is fitted on the outer surface of the limiting tube, the outer surface of the limiting tube is provided with an anti-slip groove, the outer surface of the connecting tube is fitted with a movable connecting seat, the end of the movable connecting seat is provided with a first groove for the fixed connecting seat to be threadedly connected, the middle of the movable connecting seat is provided with a second groove, and four spring pressure plates are fixed on the inner side wall of the second groove.

[0007] Furthermore, the interiors of the first and second slots are connected for the insertion of the connecting pipe. The internal dimensions of the first slot are adapted to the external dimensions of the fixed connecting seat. A first sealing ring is snapped into the inner top of the first slot, thereby further improving the sealing performance of the connecting pipe connection.

[0008] Furthermore, the four spring pressure plates are symmetrically distributed, and each spring pressure plate is arc-shaped. Several protrusions are fixed on the side wall of each spring pressure plate near the connecting pipe, which improves the stability of the connecting pipe support.

[0009] Furthermore, the side wall of the syringe is engraved with scale lines, and the internal dimensions of the syringe are adapted to the external dimensions of the piston plate and piston block, which improves the injection accuracy.

[0010] Furthermore, a clamp is fitted onto the outer surface of the syringe, and two handles are symmetrically fixed on the side wall of the clamp, which improves the ease of gripping.

[0011] Furthermore, a limiting post is fixedly provided at the inner bottom of the base. The external dimensions of the limiting post are adapted to the internal dimensions of the injection cylinder, and the output end of the electric push rod passes through the middle of the base and the limiting post.

[0012] Furthermore, a third sealing ring is snapped into the inner bottom of the base. The third sealing ring is circular and sleeved on the outer surface of the limiting post, which improves the sealing performance of the base installation.

[0013] Furthermore, the end cap, the fixed connecting seat, and the limiting tube are connected in the middle, and a second sealing ring is snapped into the inner top of the end cap.

[0014] The beneficial effects of this utility model are:

[0015] Compared to traditional constant pressure gastric tube feeding devices, this device improves the anti-slip properties of the connection between the end of the connecting tube and the limiting tube through the cooperation of the limiting tube, anti-slip groove, and connecting tube. The cooperation of the fixed and movable connecting seats enhances the overall stability of the spring pressure plate's movement. The spring pressure plates are symmetrically distributed in an arc shape on the inner wall of the second groove, pressing against the side wall of the connecting tube, thereby improving the stability of the connecting tube sleeved on the outer surface of the limiting tube and preventing it from loosening and falling off, thus improving feeding stability. Furthermore, the inclusion of protrusions and a first sealing ring increases frictional resistance, improving the stability of the contact between the spring pressure plate and the connecting tube, while the annular first sealing ring improves the sealing performance of the connection between the movable and fixed connecting seats. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the overall structure of the constant pressure gastric tube feeding device of this utility model.

[0017] Figure 2 The diagram shown is an exploded structural illustration of this utility model.

[0018] Figure 3 The diagram shown is a cross-sectional view of the end cap structure of this utility model;

[0019] Figure 4The diagram shown is a cross-sectional view of the movable connecting seat of this utility model;

[0020] Figure 5 The diagram shown is a schematic representation of the base structure of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Injector; 2. Base; 3. Electric actuator; 4. End cap; 5. Movable connecting seat; 6. Connecting pipe; 7. Fixed connecting seat; 8. Limiting tube; 9. First groove; 10. Clamp; 11. Handle; 12. Piston plate; 13. Piston block; 14. Scale line; 15. Second groove; 16. Spring pressure plate; 17. Anti-slip groove; 18. Protrusion; 19. First sealing ring; 20. Second sealing ring; 21. Limiting post; 22. Third sealing ring. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Among the currently discovered feasible technologies, the following are described:

[0024] In the medical field, nutritional intake is a crucial aspect of maintaining life for patients who are unable to eat orally for various reasons. As a key tool for delivering nutrients, the nasogastric tube feeding device not only bears the heavy responsibility of providing daily nutritional support but also plays a vital role in promoting patient recovery. This article will provide a comprehensive introduction to nasogastric tube feeding devices from multiple perspectives, including definition, structure, principle, usage, cleaning and maintenance, types, applicable populations, and precautions.

[0025] A nasogastric tube feeding device is a specialized medical device primarily used to assist patients who cannot eat normally orally. It delivers nutritional solutions, medications, or liquid foods into the stomach through a tube, thereby meeting the patient's nutritional needs, ensuring normal bodily function, and maintaining basic physiological functions. Its advent has greatly improved nutritional support for this special patient group and is an indispensable tool in modern medical care.

[0026] The syringe is the core component of a nasogastric tube feeding device, typically consisting of a barrel, a piston, and a plunger. The barrel is usually made of transparent material, allowing medical staff and caregivers to clearly observe the amount of food or medication being drawn and pushed. The piston and plunger are designed to generate pressure by manual pushing, injecting the substance from the syringe into the nasogastric tube.

[0027] The connecting tube is used to connect the syringe and is generally made of soft and elastic silicone or plastic. The flexibility of the connecting tube ensures that the gastric tube will not be excessively stretched during operation, while also effectively reducing irritation to the patient's nasal cavity, pharynx and esophagus, reducing the patient's discomfort during feeding. The inner diameter of the connecting tube needs to be carefully designed to ensure that food or medicine can pass through smoothly while preventing leakage.

[0028] Before using a nasogastric tube feeder, the patient's condition must be assessed to ensure the tube is correctly positioned and to avoid misoperation during feeding. Prepare an appropriate amount of food or medication at a suitable temperature and with a uniform texture. Food choices should be tailored to the patient's condition and nutritional needs, generally consisting of easily digestible liquids such as rice water, vegetable juice, and milk. Additionally, check that the feeder is intact and that the connecting tube and nasogastric connector are securely attached.

[0029] Pull the syringe plunger to the appropriate position and draw up the prepared food or medication. During the drawing process, take care to avoid air ingress, which can cause bloating or other discomfort in the patient when feeding. If medication is being drawn, strictly follow the doctor's instructions for dosage control and ensure the medication is completely dissolved to prevent precipitation or particles from clogging the gastric tube.

[0030] After ensuring a secure connection between the feeding device's connector and the connecting tube, slowly push the syringe plunger to inject food or medication into the stomach. The injection speed should be moderate, neither too fast nor too slow. Injecting too quickly may cause adverse reactions such as choking or vomiting, while injecting too slowly may affect the efficiency of the injection and increase the patient's discomfort time. Generally, each injection should not exceed 200mL, and the interval between injections should be no less than 2 hours.

[0031] After feeding, use a syringe to draw an appropriate amount of warm water, reconnect the gastric tube, and slowly inject it to flush out any remaining food or medication, prevent blockage, and ensure the inner wall of the gastric tube is clean.

[0032] After each use, the feeding tube should be cleaned immediately. First, disassemble the syringe, connecting tube, and nasogastric connector, and rinse with running warm water to remove any residual food or medication. Then, use a specialized cleaning agent to carefully clean all parts, paying particular attention to areas prone to dirt buildup, such as the inner wall and piston of the syringe, the inside of the connecting tube, and the connection points of the nasogastric connector. After cleaning, rinse thoroughly with clean water to ensure no cleaning agent residue remains.

[0033] After cleaning, the feeding equipment needs to be disinfected to kill any bacteria and viruses that may be present. Common disinfection methods include boiling and chemical disinfection. For boiling disinfection, immerse all parts of the feeding equipment in boiling water and boil for 15-20 minutes, then remove and air dry. For chemical disinfection, use chlorine-containing disinfectants or peracetic acid, soaking the equipment according to the specified concentration and time, and then rinse thoroughly with clean water.

[0034] Regularly inspect the feeding tube device, checking for damage to the syringe, the flexibility of the piston, aging or cracking of the connecting tube, and looseness of the nasogastric feeding connector. If any problems are found, replace the parts or the entire feeding tube promptly to ensure its proper functioning.

[0035] Example 1

[0036] Please refer to Figures 1-5 A detachable screw-driven constant pressure gastric tube feeding device includes an injection cylinder 1 and a connecting tube 6. The injection cylinder 1 is made of transparent plastic and is used to fill liquid food. A base 2 is threaded to the bottom end of the injection cylinder 1 to seal and support it. The connecting tube 6 is made of silicone and is inserted into the patient's esophagus to deliver liquid food. An electric actuator 3 is bolted to the bottom end of the base 2. A piston plate 12 is fixed to the output end of the electric actuator 3. A piston block 13 is fitted onto the end of the piston plate 12. The internal dimensions of the injection cylinder 1 are adapted to the external dimensions of the piston plate 12 and the piston block 13. Activating the electric actuator 3 causes the piston plate 12 and the piston block 13 to slide in the middle of the injection cylinder 1. The piston block 13 is made of silicone and has elasticity to improve the sealing of the liquid food delivery. An end cap 4 is threaded to the top end of the injection cylinder 1 to seal it. A fixing connector is fixed to the top end of the end cap 4. The top of the fixed connecting seat 7 is fixedly provided with a limiting tube 8, which is frustoconical in shape. The connecting tube 6 is sleeved on the outer surface of the limiting tube 8. The outer surface of the limiting tube 8 is provided with an anti-slip groove 17 to increase frictional resistance. The outer surface of the connecting tube 6 is sleeved with a movable connecting seat 5. The end of the movable connecting seat 5 is provided with a first groove 9 for threaded connection of the fixed connecting seat 7. The middle of the movable connecting seat 5 is provided with a second groove 15. Four spring pressure plates 16 are fixedly provided on the inner side wall of the second groove 15. The spring pressure plates 16 are all arc-shaped. Rotating the movable connecting seat 5 can drive the spring pressure plates 16 to move synchronously, so that the spring pressure plates 16 are supported on the side wall of the connecting tube 6 in sequence. The spring pressure plates 16 and the limiting tube 8 cooperate to make the connecting tube 6 stably sleeved on the outer surface of the limiting tube 8, thereby preventing loosening and falling off and improving the stability of liquid food injection.

[0037] The first slot 9 and the second slot 15 are internally connected for the insertion of the connecting pipe 6. The internal dimensions of the first slot 9 are adapted to the external dimensions of the fixed connecting seat 7. The first sealing ring 19 is snapped into the inner top of the first slot 9, which improves the sealing performance of the connecting pipe 6. The four spring pressure plates 16 are symmetrically distributed. Several protrusions 18 are fixed on the side wall of the spring pressure plates 16 near the connecting pipe 6, which improves the stability of the connecting pipe 6 support.

[0038] The side wall of the syringe 1 is engraved with scale lines 14, which improves the injection accuracy. The outer surface of the syringe 1 is fitted with a clamp 10, and two handles 11 are symmetrically fixed on the side wall of the clamp 10, which improves the convenience of gripping.

[0039] A limiting post 21 is fixedly provided at the inner bottom of the base 2. The external dimensions of the limiting post 21 are adapted to the internal dimensions of the injection cylinder 1. The output end of the electric push rod 3 passes through the middle of the base 2 and the limiting post 21. A third sealing ring 22 is snapped into the inner bottom of the base 2. The third sealing ring 22 is annularly sleeved on the outer surface of the limiting post 21, which improves the sealing performance of the base 2 installation. The end cap 4, the fixed connecting seat 7 and the limiting tube 8 are connected in the middle. A second sealing ring 20 is snapped into the inner top of the end cap 4.

[0040] When using this constant pressure gastric tube feeding device, medical staff first connect an external power source and then rotate the end cap 4 counterclockwise to open it, facilitating the pouring of liquid food from the top of the syringe 1 into the syringe 1. The end cap 4 is then screwed clockwise onto the top of the syringe 1 to seal it. Next, the connecting tube 6 is fitted onto the outer surface of the limiting tube 8. The limiting tube 8 is frustoconical, and the anti-slip groove 17 increases the frictional resistance with the limiting tube 8. Finally, the movable connecting seat 5, fitted onto the outer surface of the connecting tube 6, is screwed clockwise onto the outer surface of the fixed connecting seat 7. The internal dimensions of the first groove 9 are matched with the external dimensions of the fixed connecting seat 7, improving the mobility of the connecting tube. The stability of the connection between the connector 5 and the fixed connector 7 is improved by the four spring pressure plates 16 moving synchronously with the movable connector 5. The spring pressure plates 16 are supported on the side wall of the connecting tube 6 in sequence. Under the pressure of the spring pressure plates 16, the connecting tube 6 is sleeved on the outer surface of the limiting tube 8 and connected to the inside of the anti-slip groove 17, thereby improving the stability of the connection between the connecting tube 6 and the limiting tube 8 and preventing the connecting tube 6 from sliding and loosening. The other end of the connecting tube 6 is inserted into the patient's esophagus. The electric push rod 3 can drive the piston block 13 to move stably, thereby maintaining constant pressure and ensuring that the liquid food is stably delivered to the patient's stomach through the connecting tube 6, thereby improving the stability of feeding.

[0041] It is also considered that the spring pressure plate 16 slides on the side wall of the connecting tube 6, and several protrusions 18 are fixed on the inner side wall of the spring pressure plate 16. The spring pressure plate 16 increases the frictional resistance in a synchronous manner, thereby improving the stability of the spring pressure plate 16 pressing the connecting tube 6.

[0042] It also takes into account that the overflow of liquid food is improved by setting a first sealing ring 19 to improve the sealing of the connection between the movable connecting seat 5 and the fixed connecting seat 7.

[0043] Also considering equipment contamination, medical staff can remove the base 2 and end cap 4 from both ends of the syringe 1 by rotating the end cap 4 and the base 2, which facilitates disassembly and cleaning. When it is necessary to disassemble the connecting tube 6, medical staff can rotate the movable connecting seat 5 counterclockwise to separate the fixed connecting seat 7 and the movable connecting seat 5, thereby releasing the spring pressure plate 16 from limiting the connecting tube 6, which makes it easy to remove the connecting tube 6 sleeved on the outer surface of the limiting tube 8 for cleaning and replacement.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detachable screw-driven constant pressure gastric tube feeding device, characterized in that, The syringe includes a syringe (1) and a connecting tube (6): the bottom end of the syringe (1) is threadedly connected to a base (2), the bottom end of the base (2) is fixedly provided with an electric actuator (3), the output end of the electric actuator (3) is fixedly provided with a piston plate (12), the end of the piston plate (12) is fitted with a piston block (13), the top end of the syringe (1) is threadedly connected to an end cap (4), the top end of the end cap (4) is fixedly provided with a fixed connecting seat (7), and the top end of the fixed connecting seat (7) is fixedly provided with a limit. The tube (8) and the connecting tube (6) are fitted on the outer surface of the limiting tube (8). The outer surface of the limiting tube (8) is provided with an anti-slip groove (17). The outer surface of the connecting tube (6) is fitted with a movable connecting seat (5). The end of the movable connecting seat (5) is provided with a first groove (9) for the fixed connecting seat (7) to be threaded. The middle of the movable connecting seat (5) is provided with a second groove (15). Four spring pressure plates (16) are fixed on the inner side wall of the second groove (15).

2. The detachable screw-driven constant pressure gastric tube feeding device according to claim 1, characterized in that: The first slot (9) and the second slot (15) are connected internally for the insertion of the connecting pipe (6). The internal dimensions of the first slot (9) are adapted to the external dimensions of the fixed connecting seat (7). The first sealing ring (19) is snapped into the inner top of the first slot (9).

3. The detachable screw-driven constant pressure gastric tube feeding device according to claim 1, characterized in that: The four spring pressure plates (16) are symmetrically distributed. All the spring pressure plates (16) are arc-shaped. Several protrusions (18) are fixed on the side wall of the spring pressure plates (16) near the connecting pipe (6).

4. The detachable screw-driven constant pressure gastric tube feeding device according to claim 1, characterized in that: The side wall of the syringe (1) is engraved with scale lines (14), and the internal dimensions of the syringe (1) are adapted to the external dimensions of the piston plate (12) and the piston block (13).

5. The detachable screw-driven constant pressure gastric tube feeding device according to claim 1, characterized in that: The outer surface of the syringe (1) is fitted with a clamp (10), and two handles (11) are symmetrically fixed on the side wall of the clamp (10).

6. The detachable screw-driven constant pressure gastric tube feeding device according to claim 1, characterized in that: A limiting post (21) is fixedly provided at the bottom inner part of the base (2). The external dimensions of the limiting post (21) are adapted to the internal dimensions of the injection cylinder (1). The output end of the electric push rod (3) passes through the middle of the base (2) and the limiting post (21).

7. The detachable screw-driven constant pressure gastric tube feeding device according to claim 1, characterized in that: The bottom of the base (2) is fitted with a third sealing ring (22), which is annularly fitted on the outer surface of the limiting post (21).

8. The detachable screw-driven constant pressure gastric tube feeding device according to claim 1, characterized in that: The end cap (4), the fixed connecting seat (7) and the limiting tube (8) are connected in the middle, and the inner top of the end cap (4) is fitted with a second sealing ring (20).

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